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Home » A is twice as old as B. Ten years ago, A was three times as old as B. Find B’s present age.

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A is twice as old as B. Ten years ago, A was three times as old as B. Find B’s present age.

A. 15 years
B. 18 years
C. 20 years ✅
D. 22 years

Explanation

  • Let B = x, A = 2x
  • (2x - 10) = 3(x - 10)
  • 2x - 10 = 3x - 30
  • x = 20
  • B's present age = 20 years